Title: Information handling system capable of detecting frequency lock and method thereof
Application Number: 200610159338 Application Date: 2006.09.27
Publication Number: 1940584 Publication Date: 2007.04.04
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G01R31/28;H03L7/08
Applicant(s) Name: IBM Address:
Inventor(s) Name:
Attorney & Agent: huangxiao lin wangzhi sen
Abstract:
    An information handling system including a frequency synthesizer lock detection system is disclosed that distributes a frequency synthesizer output signal across a distribution network to one or more receptor circuits. The distribution network may exhibit delay and other distortion that may cause the downstream signal arriving at the receptor circuit to lose frequency lock with both the frequency synthesizer output signal and a reference clock signal that controls the frequency of the synthesizer output signal. The lock detection system tests the downstream signal to determine if the downstream signal exhibits a lock with respect to the reference clock that determines the operating frequency of the frequency synthesizer. In this manner, lock of the downstream signal to the reference clock signal may be accurately assessed in one embodiment.
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